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Structural Engineering and Mechanics Volume 56, Number 6, December25 2015 , pages 1063-1093 DOI: https://doi.org/10.12989/sem.2015.56.6.1063 |
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New indices of structural robustness and structural fragility |
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Joao Andre, Robert Beale and Antonio M. Baptista
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| Abstract | ||
| Structural robustness has become an important design variable. However, based on the existing definitions of structural robustness it is often difficult to analyse and evaluate structural robustness, and sometimes not efficient since they mix structural robustness with several other structural variables. This paper concerns the development of a new structural robustness definition, and structural robustness and structural fragility indices. The basis for the development of the new indices is the analysis of the damage energy of structural systems for a given hazard scenario and involves a criterion to define an \"unavoidable collapse\" state. Illustrative examples are given detailing the steps and calculations needed to obtain values for both the structural robustness and the structural fragility indices. Finally, this paper presents the main advantages of the newly proposed definition and indices for the structural risk analysis over existing traditional methods. | ||
| Key Words | ||
| structural robustness; structural fragility; structural collapse; energy analysis; falsework | ||
| Address | ||
| Joao Andre: Department of Structures, National Laboratory for Civil Engineering, Av. Brasil, 101, 1700-066 Lisbon, Portugal Robert Beale: Department of Mechanical Engineering and Mathematical Sciences, Oxford Brookes University, Wheatley Campus, OX33 1HX Oxford, UK Antonio M. Baptista: Department of Structures, National Laboratory for Civil Engineering, Av. Brasil, 101, 1700-066 Lisbon, Portugal | ||